Answer: ozone concentration
Explanation: The Dobson Unit is the most common unit for measuring ozone concentration. Becuse ozone concentration is hard to measure they use The Dobson Unit.
There is no difference in mental abilities between genders
The population of all the mitochondria of a given cell constitutes the chondriome. A single mitochondrion is often found in unicellular organisms, while human liver cells have about 1000–2000 mitochondria per cell, making up 1/5 of the cell volume.
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The mitochondria is the powerhouse of the cell because it produces ATP, which is energy.